Review on scheduling techniques of preventive maintenance activities of railway

Maintenance is vital in any service/industrial organizations as it could prevent unexpected breakdown of equipment's that may result in unexpected cost associated with productivity and quality of services or products. Maintenance is very expensive, therefore an effective maintenance strategies and optimal maintenance schedule are required to reduce the overall maintenance budget cost without reducing the maintenance itself and neglecting the serviceability level of the equipment's/machines. This study will investigate state-of-art the of preventive maintenance scheduling algorithm and provide an optimal schedule for the maintenance activities that aims to minimize the overall maintenance cost and optimize make span of preventive maintenance activities. This case study takes few examples of countries that applied preventive maintenance scheduling in railway. This paper will discuss four types of scheduling techniques which are used in solving preventive maintenance scheduling problem